Leandra therezopolitana Cogn. in de Candolle & de Candolle (1891: 1186)

Reginato, Marcelo, 2016, Taxonomic revision of Leandra sect. Leandra (Melastomataceae, Miconieae), Phytotaxa 262 (1), pp. 448-450 : 448-450

Phytotaxa 262 (1) © 2016 Magnolia Press • 75 14. Leandra therezopolitana Cogn. in de Candolle & de Candolle (1891: 1186) . Lectotype (second-step, designated here):— BRAZIL. Rio de Janeiro: Teresópolis , Serra dos Órgãos, February 1888, J. de Moura 157 ( BR 5194018 image!, isolectotypes BR 5193981 image!, RB!). ( Figs. 66 , 67 , 68 , 69 )

Shrubs, 1 m tall. Branches, petioles, leaves, inflorescences, bracts and bracteoles covered by appressed, unbranched trichomes (ca. 0.5), these sparser on the old branches and leaf surfaces, denser on the acrodromous veins of leaf surfaces, petioles, inflorescences and hypanthia. Leaves slightly anisophyllous in each pair (up to 3:7 ratio); petioles 0.8–1.5 cm long; blades 4–8 × 2–3 cm, lanceolate to elliptic-lanceolate, apex shortly acuminate, base cuneate, margin entire or crenulate, ciliate (0.5 mm), chartaceous; 5 acrodromous nerves, plus 0–1 additional pair of faint veins, plinerved, distant 3–8 mm above the base, acrodromous nerves slightly conspicuous on adaxial surface and acrodromous and transversal nerves slightly prominent on abaxial, reticulation slightly conspicuous. Inflorescences terminal, 1 per node, ca. 4 cm long, 3 pairs of opposite paraclades, accessory branches absent, 14 flowers per inflorescence, these in glomerules; bracteoles 5–7 × 1.5–2 mm, lanceolate, uniformly covered by unbranched trichomes, partially involucral, early caducous. Flowers 6-merous, sessile. Hypanthium 4.5 × 3.5 mm, campanulate to tubular, torus indumentum absent. Calyx tube ca. 0.5 mm long; inner lobes ca. 0.5 × 0.7 mm, deltoid; external teeth 1.5–2 mm long. Petals white, 4 × 1.3 mm, linear to lanceolate, apex acuminate, glabrous, spreading at anthesis. Stamens 12, opposite to the style; filaments geniculation absent or slightly conspicuous, the larger 5.5 mm long, the smaller 5 mm long; anthers pink, the larger 5 mm long, the smaller 4.2 mm long, linear-subulate, dorsally curved, pore 0.15 mm wide, connectives dorsally produced below the anthers 0.7 mm, appendage absent. Ovary 3-celled, 1.5–1.7 × 1–1.2 mm, 30–40 % inferior, apex sparsely covered by unbranched trichomes (ca. 0.8 mm). Style 13 mm long, sigmoid, opposite of the stamens, stigma 0.2 mm diam. Fruits and seeds not seen.

76 • Phytotaxa 262 (1) © 2016 Magnolia Press

REGINATO

Notes:— Leandra therezopolitana is only known from Serra dos Órgãos (Rio de Janeiro). It is morphologically similar to L. hirta and L. aspera . From the former it is differentiated by the predominantly 6-merous flowers and pink anthers, while from the later by the plinerved leaves. One specimen from a second locality (Pico do Frade, mun. Macaé, Rio de Janeiro) was previously identified as L. therezopolitana , but presents persistent bracts with a different indumentum and very conspicuous internal calyx lobes. This specimen is treated here as L. melastomoides (in the "minifolia" morphotype).

Specimens examined:— BRAZIL. Rio de Janeiro: Teresópolis, Giordano 2567 (NY, RB), Moura 6041 (RB), Reginato 1097 (NY, UPCB), Reginato 1099 (UPCB).

Figures

FIGURE 66. Distribution of Leandra therezopolitana.

FIGURE 67. Leandra therezopolitana. A. Habit. B. Leaf on abaxial view. C. Branch with inflorescence. D. Flower. C—Photo by M. Nadruz.

FIGURE 68. Leandra therezopolitana. A. Inflorescence. B. Branch with inflorescence. C. Detail of the leaf base. D. Detail of the shoot. E. Detail of the leaf on adaxial view. F. Leaf on abaxial view. Voucher: Reginato 1099.

FIGURE 69. Leandra therezopolitana. A. Flower. B. Flower bud. C. Hypanthium and calyx longitudinal section. D. Bracteole. E. Detail of the calyx. F. Hypanthium and ovary cross section. G. Detail of ovary apex. H. Petal. I. Anthers. J. Stamens. Scales: A–D, H–J = 1 mm; E–G = 0.25 mm. Voucher: Reginato 1097.